Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58496b6f71b6cdd9ba7a4b2f67911a74035162b974e4e656a4cf8dbe0614db77' 
  AND token = '1IXdR5hV6E1tvahbEnY8zfPTnV5yrAEmMonEFjvSX5Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}